Xiruana bifida, Oliveira, Luiz Fernando M. & Brescovit, Antonio D., 2015

Oliveira, Luiz Fernando M. & Brescovit, Antonio D., 2015, A taxonomic revision of the Neotropical spider genus Xiruana Brescovit 1997 (Araneae: Anyphaenidae, Anyphaeninae), Zootaxa 3980 (2), pp. 201-229: 214-216

publication ID

http://dx.doi.org/10.11646/zootaxa.3980.2.3

publication LSID

lsid:zoobank.org:pub:13D14535-2FCD-4E8D-A8EC-01CC9D6F38CC

persistent identifier

http://treatment.plazi.org/id/03839756-FFF6-FFBC-FF23-FAA4FC74FD22

treatment provided by

Plazi

scientific name

Xiruana bifida
status

new species

Xiruana bifida  new species

Figs 8View FIGURE 8 A –H; 16 A

Type material. Male holotype from Fazenda Cesumar, Maringá (23 ° 25 ’ 30 ”S; 51 ° 56 ’ 20 ”W), Paraná, Brazil, XII. 2007 – III. 2008, E.G.C. Silva leg., deposited in IBSP 134132; female paratype from São Miguel do Oeste (26 ° 43 ’ 30 ”S; 53 ° 31 ’04”W), Santa Catarina, Brazil, III. 2004 – VII. 2004, J. Barp leg., deposited in IBSP 79217.

Etymology. The specific name is a Latin adjective referring to the conspicuous bifurcation of the male palpal median tibial apophysis.

Diagnosis. Males of Xiruana bifida  n. sp. differ from others in the genus by the palp having an extremely large embolar base ( Fig. 8View FIGURE 8 A) and the median tibial apophysis having two long branches ( Figs 8View FIGURE 8 E, F). Females are readily recognizable by the epigynal anterior border with the same length as the posterior border and by the large, straight borders of the median septum ( Fig. 8View FIGURE 8 G).

Description. Male ( IBSP 134132). Coloration as in X. hirsuta  . Total length 7.7, carapace length 3.2, width 2.5. Clypeus height 0.12. Eye diameters and interdistances: AME 0.12, ALE 0.14, PME 0.14, PLE 0.12; AME –AME 0.06, AME –ALE 0.04, PME –PME 0.18, PME –PLE 0.12, ALE –PLE 0.05. Chelicerae 1.5 long, with five promarginal teeth and five retromarginal denticles. Leg measurements: Leg I—femur 3.5 / patella 1.5 / tibia 4.1 / metatarsus 3.65 / tarsus 1.6 / total 14.35; II— 3.2 / 1.35 / 3.4 / 3.1 / 1.2 / 12.25; III— 2.6 / 1.0/ 1.9 / 2.3 / 0.8 / 8.6; IV— 3.7 / 1.3 / 3.15 / 4.23 / 1.0/ 13.38. Leg spination: I—tibia p 1 - 1 -0; II—tibia p 1 - 1 -0, metatarsus v 2 - 1 -0; III—tibia v 1-2 - 2; IV—tibia p 1 - 1 - 1, r 1 - 1 - 1. Palp: retrolateral tibial apophysis with long anterior branch and short posterior branch ( Figs 8View FIGURE 8 D –F); median apophysis enlarged distally and sinuous at apex ( Figs 8View FIGURE 8 B, C). Abdomen: length 4.0, epigastric furrow 0.45 from tracheal spiracle, spiracle 2.1 from base of spinnerets.

Female ( IBSP 79217). Coloration as in male. Total length 9.4, carapace length 3.8, width 3.0. Clypeus height 0.12. Eye diameters and interdistances: AME 0.16, ALE 0.14, PME 0.14, PLE 0.14; AME –AME 0.08, AME –ALE 0.04, PME –PME 0.20, PME –PLE 0.15, ALE –PLE 0.04. Chelicerae 2.3 long, with four promarginal teeth and six retromarginal denticles. Leg measurements: Leg I—femur 3.4 / patella 1.6 / tibia 3.6 / metatarsus 3.0/ tarsus 1.2 / total 12.8; II— 3.3 / 1.6 / 3.1 / 2.63 / 1.2 / 11.83; III— 2.6 / 1.2 / 1.9 / 2.3 / 0.8 / 8.8; IV— 3.7 / 1.35 / 3.1 / 4.1 / 0.9 / 13.15. Leg spination: I—tibia v 2 - 2 -0, p0, r0, metatarsus v 2 -0-0, p0, r0; II—tibia v 2 - 2 -0, p 1 - 1 -0, r0, metatarsus v 2 -0-0, p0, r0; III—metatarsus p 1 - 0-1, r 1 - 0-1; IV—tibia p 1 - 0-1, r 1 - 0-1. Abdomen: length 5.59, epigastric furrow 0.8 from tracheal spiracle, spiracle 2.59 from base of spinnerets. Epigynum: copulatory ducts curved distally; seminal receptacles next to the spermathecae, with short ducts, fertilization ducts shorter than spermathecae (Figs G, H).

Variation. Males (n = 8): total length 7.3 –10.0; carapace 3.1–4.3; femur I 3.5–4.7.

Other material examined. BRAZIL, São Paulo: Ribeirão Preto, (21 ° 10 ’ 40 ”S; 47 ° 48 ’ 36 ”W), Campus UNESP, 1 ♂, 13.XI. 2003 - 05.I. 2004, H. F. Mendes; C. M. Polegatto leg. ( IBSP 58158); São Paulo (23 ° 32 ’ 51 ”S; 46 ° 38 ’ 10 ”W), Nova Europa, Fazenda Itaquerê, 1 ♂, 23.XI. 1963, K. Lenko leg. ( MZSP 9945). PARAGUAY. Asunción: (25 ° 16 ' 55.91 "S; 57 ° 38 ' 6.36 W), Jardín Botánico, 1 ♂, 1 #J, ( ZMB 2335); 2 ♂, 1 #J, ( ZMB 2434); 1 ♂, ( ZMB 2353); 1 ♂, ( ZMB 3765); 1 ♂, 1 ♀, 1 #J, ( ZMB 3739), all collected by K. Fiebrig.

Distribution. Southeast and South Brazil, Central Paraguay ( Fig. 16View FIGURE 16 A).

IBSP

Instituto Biologico de Sao Paulo

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

ZMB

Museum für Naturkunde Berlin (Zoological Collections)

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Anyphaenidae

Genus

Xiruana